EP 3602374 B1 20220622 - SYSTEM AND METHOD FOR RESTORATION OF A TRUSTED SYSTEM FIRMWARE STATE
Title (en)
SYSTEM AND METHOD FOR RESTORATION OF A TRUSTED SYSTEM FIRMWARE STATE
Title (de)
SYSTEM UND VERFAHREN ZUR WIEDERHERSTELLUNG EINES SICHEREN ZUSTANDS EINER SYSTEM-FIRMWARE
Title (fr)
SYSTÈME ET PROCÉDÉ DE RESTAURATION D'UN ÉTAT DE MICROLOGICIEL DE SYSTÈME DE CONFIANCE
Publication
Application
Priority
- US 201715466514 A 20170322
- US 2017063915 W 20171130
Abstract (en)
[origin: US2018276385A1] Operations include restoring a trusted system firmware state. A system stores a set of self-contained secure code in a secure code store. The system stores a set of operational code in an operational code store. The system executes the secure code or the operational code upon system start up, depending whether the system is configured in a secure mode, or in a normal operational mode. When the system is configured in secure mode, the system executes the secure code. In secure mode, the system also overwrites a current version of the operational code stored in the operational code store with a replacement version of the operational code referenced by the secure code. When the system is configured in normal operational mode, the system executes the operational code. During normal operation, the secure code store is electrically isolated.
IPC 8 full level
G06F 21/57 (2013.01)
CPC (source: EP US)
G06F 3/0622 (2013.01 - US); G06F 3/0634 (2013.01 - US); G06F 3/0656 (2013.01 - US); G06F 3/0659 (2013.01 - US); G06F 3/0679 (2013.01 - US); G06F 21/572 (2013.01 - EP US); G06F 21/85 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 10997296 B2 20210504; US 2018276385 A1 20180927; CN 110494855 A 20191122; CN 110494855 B 20230926; EP 3602374 A1 20200205; EP 3602374 B1 20220622; JP 2020511727 A 20200416; JP 7200122 B2 20230106; WO 2018174969 A1 20180927
DOCDB simple family (application)
US 201715466514 A 20170322; CN 201780088689 A 20171130; EP 17817979 A 20171130; JP 2019552048 A 20171130; US 2017063915 W 20171130